Fixed testRemoveImage

The IDs of the images changed, so need to update the test.
Merge pull request #36 from spotify/rculbertson/fix-remove-image-test

Fixed testRemoveImage
[maven-release-plugin] prepare release v2.4.3
[maven-release-plugin] prepare for next development iteration
Added restartContainer method to docker client
change test to compare state pid
Merge pull request #35 from mosheeshel/feature/restartContainer

Added restartContainer method to client